Apply the aluminum foil adhesive tape onthe back of the cover to reduce the dustthat is collected by the static chargewhich may cause the contaminations

Power supply current (Ta=26°C) : Vbattery=4.51V(SR44×3),
Irun≈1.0mA,
Iidle≈120μA,
ISB<0.1μA
Low battery indicator turns on when Vbattery < 3.5V
Self-diagnostic test ([C]+[1/χ]) kept running without errors even if the Vbattery
decreased to the voltage of 1.9V that you can hardly read the LCD.
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